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+1=-7-P
We move all terms to the left:
+1-(-7-P)=0
We add all the numbers together, and all the variables
-(-1P-7)+1=0
We get rid of parentheses
1P+7+1=0
We add all the numbers together, and all the variables
P+8=0
We move all terms containing P to the left, all other terms to the right
P=-8
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